ELLSWORTH AIR FORCE BASE, S.D. -- Airman 1st Class Matthew Hung, 28th Civil Engineer Squadron emergency management journeyman, uses a radiological detector to test the levels of radioactivity in the area while Staff Sgt. Dawn Greenman, 28th CES emergency management training NCO in charge, writes down the numbers during a joint training mission in Rapid City, S.D., Nov. 4. Airmen from the 28th Bomb Wing worked closely with the South Dakota National Guard’s 82nd Civil Support Team, as well as the Rapid City Fire Department to properly assess and handle the simulated chemical incident. (U.S. Air Force photo/Senior Airman Anthony Sanchelli)